Tendency to stay in place (7)

I believe the answer is:

inertia

(Other definitions for inertia that I've seen before include "Motion (if any) when no external force is applied" , "I retain, being without energy" , "Tendency to remain at rest or in steady motion" , "Slowness to react" , "Feeling of slowness to act, as I retain" .)

I've seen this clue in The Wall Street Journal.

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